Big Sur & Firewalls

By +Steve B
in Apple (macOS)

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I have to assume others have ran into this issue where the new 3rd party firewalls setup with Big Sur has caused headaches.  I've tried McAfee, Intego and these firewalls create some kind of network extension and that appears to operate as the firewall.  However, this setup kills my internet access on my virtual machines through parallels.  Both Windows 10 and Ubuntu lose internet access unless I go into the MacOS Network Preferences and disabled the network extension the firewall creates....thus basically turning the firewall off.  

 

Assuming others have ran into this, has any discovered an actual fix?

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  • +Steve B changed the title to Big Sur & Firewalls
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goretsky Supervisor

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Hello,

 

Apple's change from requiring firewalls that were using kernel extensions (kext) to using system extensions (sext) in macOS 10.15.4 has required all of the firewall developers to rewrite their firewalls.  As far as I know, you just have to wait for the replacements to arrive.

 

Regards,

 

Aryeh Goretsky

 

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On 26/04/2021 at 01:44, goretsky said:

Hello,

 

Apple's change from requiring firewalls that were using kernel extensions (kext) to using system extensions (sext) in macOS 10.15.4 has required all of the firewall developers to rewrite their firewalls.  As far as I know, you just have to wait for the replacements to arrive.

 

Regards,

 

Aryeh Goretsky

 

Interesting.  I was tinkering with stuff yesterday and managed to get it working once but was unable to duplicate the success.   I had the VMs set to "default adapter" instead of the recommended "shared network" and on MacOS shared my wifi with "ethernet adapter en4" and "ethernet adapter en5".  It worked then but, when I tried to pinpoint and duplicate, it wouldn't happen again.  So apparently it was some random fluke. Lol

  • 2 months later...
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Well, whatever the issue was.  It apparently is fixed now.  I had uninstalled Netbarrier (Intego) just to not deal with it and recently reinstalled it and now my VMs work fine with Netbarrier.  So all appears to be well, at least on my end. 😃

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